MediumFix available
php8.2, php8.4 — security advisory
When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.
- Products
- php8.2, php8.4
- Affected versions
- 8.2.10-1, 8.2.10-2, 8.2.12-1, 8.2.16-1, 8.2.16-2, 8.2.17-1, 8.2.18-1, 8.2.18-1~deb12u1, 8.2.20-1~deb12u1, 8.2.20-2, 8.2.20-3, 8.2.21-1, 8.2.23-1, 8.2.24-1, 8.2.24-1~deb12u1, 8.2.26-1~deb12u1, 8.2.26-4, 8.2.27-1, 8.2.28-1~deb12u1, 8.2.29-1~deb12u1, 8.2.30-1~deb12u1, 8.2.31-1~deb12u1, 8.2.32-1~deb12u1, 8.2.33-1~deb12u1, 8.2.5-2, 8.2.7-1, 8.2.7-1.1, 8.2.7-1.2, 8.2.7-1~deb12u1, 8.4.11-1, 8.4.16-1, 8.4.16-1~deb13u1, 8.4.20-1, 8.4.21-1, 8.4.21-1~deb13u1, 8.4.22-1, 8.4.23-1, 8.4.23-1~deb13u1, 8.4.24-1, 8.4.24-1~deb13u1, 8.4.26-1~deb13u1
- Fixed versions
- 8.2.34-1~deb12u1, 8.4.26-1, 8.4.26-1~deb13u1
- CVEs
- CVE-2026-93682
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:09 UTC · Revision 1
Source evidence
When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.
osv:DEBIAN-CVE-2026-93682
php8.2
Fixed versions: 8.2.34-1~deb12u1
php8.4
Fixed versions: 8.4.26-1~deb13u1
php8.4
Fixed versions: 8.4.26-1
Complete source record
{
"id": "1248d3f30c9256d34eb19cecc716c6ccd602e1c21c2eb90f257c6b49f4fa5852",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-93682",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-93682",
"summary": "When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.",
"evidence": "osv:DEBIAN-CVE-2026-93682",
"products": [
{
"name": {
"value": "php8.2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.2.34-1~deb12u1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "8.2.10-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.10-2",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.12-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.16-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.16-2",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.17-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.18-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.18-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.20-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.20-2",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.20-3",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.21-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.23-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.24-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.24-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.26-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.26-4",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.27-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.28-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.29-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.30-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.31-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.32-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.33-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.5-2",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.7-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.7-1.2",
"evidence": "/affected/0/versions"
},
{
"value": "8.2.7-1~deb12u1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "php8.4",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.4.26-1~deb13u1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "8.4.11-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.16-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.16-1~deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.20-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.21-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.21-1~deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.22-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.23-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.23-1~deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.24-1",
"evidence": "/affected/1/versions"
},
{
"value": "8.4.24-1~deb13u1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "php8.4",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.4.26-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "8.4.11-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.16-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.16-1~deb13u1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.20-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.21-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.21-1~deb13u1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.22-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.23-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.23-1~deb13u1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.24-1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.24-1~deb13u1",
"evidence": "/affected/2/versions"
},
{
"value": "8.4.26-1~deb13u1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-93682",
"aliases": [
"DEBIAN-CVE-2026-93682"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.2.34-1~deb12u1"
}
]
}
],
"package": {
"name": "php8.2",
"purl": "pkg:deb/debian/php8.2?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"8.2.10-1",
"8.2.10-2",
"8.2.12-1",
"8.2.16-1",
"8.2.16-2",
"8.2.17-1",
"8.2.18-1",
"8.2.18-1~deb12u1",
"8.2.20-1~deb12u1",
"8.2.20-2",
"8.2.20-3",
"8.2.21-1",
"8.2.23-1",
"8.2.24-1",
"8.2.24-1~deb12u1",
"8.2.26-1~deb12u1",
"8.2.26-4",
"8.2.27-1",
"8.2.28-1~deb12u1",
"8.2.29-1~deb12u1",
"8.2.30-1~deb12u1",
"8.2.31-1~deb12u1",
"8.2.32-1~deb12u1",
"8.2.33-1~deb12u1",
"8.2.5-2",
"8.2.7-1",
"8.2.7-1.1",
"8.2.7-1.2",
"8.2.7-1~deb12u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93682.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.4.26-1~deb13u1"
}
]
}
],
"package": {
"name": "php8.4",
"purl": "pkg:deb/debian/php8.4?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"8.4.11-1",
"8.4.16-1",
"8.4.16-1~deb13u1",
"8.4.20-1",
"8.4.21-1",
"8.4.21-1~deb13u1",
"8.4.22-1",
"8.4.23-1",
"8.4.23-1~deb13u1",
"8.4.24-1",
"8.4.24-1~deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93682.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.4.26-1"
}
]
}
],
"package": {
"name": "php8.4",
"purl": "pkg:deb/debian/php8.4?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"8.4.11-1",
"8.4.16-1",
"8.4.16-1~deb13u1",
"8.4.20-1",
"8.4.21-1",
"8.4.21-1~deb13u1",
"8.4.22-1",
"8.4.23-1",
"8.4.23-1~deb13u1",
"8.4.24-1",
"8.4.24-1~deb13u1",
"8.4.26-1~deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93682.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-24T09:47:34.166833922Z",
"provider": "osv",
"upstream": [
"CVE-2026-93682"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-93682"
]
},
"related_cves": [
{
"value": "CVE-2026-93682",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429032,
"published_at": "2026-09-25T20:17:47.597+00:00"
}